(in arctic or subarctic regions) the layer of soil, above the permafrost, that thaws during the summer.
In the formation of the organs of sense the nervous layer shews itself throughout as the active layer.
The Works of Francis Maitland Balfour, Volume III (of 4) Francis Maitland Balfour
- Active list
noun (military) a list of officers available for full duty Historical Examples He had just been promoted general of brigade when he was removed from the active list as being of noble birth. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 10 Various These are the active list, and they alone hold office and vote. Socialism […]
- Active mass
the effective concentration of a substance. Historical Examples Guldberg and Waage expressed this in the form “the active mass of a solid substance is constant.” Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 Various
- Active margin
active margin active margin See convergent plate boundary.
- Active matrix
of or relating to a high-resolution liquid-crystal display (LCD) with high contrast, the most common type of flat-panel display. noun (computing) a liquid crystal display in which each pixel is individually controlled to provide a sharp image at a wide viewing angle; it is used in laptop and notebook computers (as modifier): an active-matrix screen […]